NGC 6888, Ha (Stephen Garretson)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: Crescent Nebula · HD192003 · HD192020 · HD192163 · HD192182 · HD192303 · HD192361 · HD228139 · HD228152 · HD228153 · HD228185 · HD228186 · HD228198 · HD228205 · HD228243 · HD228261 · HD228262 · HD228277 · HD228289 · HD228290 · HD228304 · HD228324 · HD228376 · LBN 203 · NGC 6888 · Sh2-105

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NGC 6888, Ha

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NGC 6888, Ha

Just for fun[?] I recently swapped out my Borg 55FL Triplets for dual William Optics 132 APOs; same ASI 2600MM cameras and Chroma 3nm filters. Going to run the longer focal length for a while before switching back. Now that the Milky Way is up for a few hours starting after midnight, I elected to take advantage of a reasonably clear night after the Moon had set to grab some Ha on an old favorite. Here are two images from the dataset; one is almost the whole FOV, some minor cropping; the other is cropped quite a bit to focus on the Crescent more fully.

For the time collected I am pretty happy with the result. Likely will continue the project as conditions allow to get a SHO version.

capture:
[17] 600s guided Ha subs
total integration: 2 hours 50 minutes

each scope/image train has the following:
William Optics FLT 132 APO with 0.8x flattener/reducer, runs at f/5.6 w/ effective focal length of 740mm
ASI 2600MM Pro
Gerd Neumann Camera Tilt Adjuster
ZWO EFW
Chroma 3nm narrowband filters
MicroTouch focus motor
Optec Libra Alt-Az Adjustment Base

Paramount MX+

guiding:
William Optics 50x200 guide scope
ASI 290 M Mini

TheSkyX, SGP, PHD2
PixInsight, Mac OS Photos, Preview

from the Beevo Dome

...Stephen

Final
Original
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Title: NGC 6888, Ha wider field

Description: This is the same data with only a minor crop to the FOV.

Uploaded: ...

The refractors!

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Status	Advanced success
Started	...
Astrometry.net job	9763068
PixInsight job	T1NS0VM61PWVMZ7KM9DTWC24G3RO7UAD
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	20h12m08s.77
RA (top/left)	20h10m44s.35
RA (top/right)	20h10m53s.66
RA (bottom/right)	20h13m32s.36
RA (bottom/left)	20h13m24s.77

Dec (center)	+38°18′02″.6
Dec (top/left)	+38°39′06″.6
Dec (top/right)	+37°55′43″.2
Dec (bottom/right)	+37°56′55″.0
Dec (bottom/left)	+38°40′18″.7

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NGC 6888, Ha

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